Laminated Graphene Films for Flexible Transparent Thin Film Encapsulation
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- 作者：Hong-Kyu Seo ; Min-Ho Park ; Young-Hoon Kim ; Sung-Joo Kwon ; Su-Hun Jeong ; Tae-Woo Lee
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2016
- 出版时间：June 15, 2016
- 年：2016
- 卷：8
- 期：23
- 页码：14725-14731
- 全文大小：433K
- 年卷期：0
- ISSN：1944-8252
文摘
We introduce a simple, inexpensive, and large-area flexible transparent lamination encapsulation method that uses graphene films with polydimethylsiloxane (PDMS) buffer on polyethylene terephthalate (PET) substrate. The number of stacked graphene layers (n<sub>Gsub>) was increased from 2 to 6, and 6-layered graphene-encapsulation showed high impermeability to moisture and air. The graphene-encapsulated polymer light emitting diodes (PLEDs) had stable operating characteristics, and the operational lifetime of encapsulated PLEDs increased as n<sub>Gsub> increased. Calcium oxidation test data confirmed the improved impermeability of graphene-encapsulation with increased n<sub>Gsub>. As a practical application, we demonstrated large-area flexible organic light emitting diodes (FOLEDs) and transparent FOLEDs that were encapsulated by our polymer/graphene encapsulant.